| ColumnType | Type of column's value. |
| Cursor | This interface provides random read-write access to the result set returned by a database query. |
| DatabaseOpenHelper | You create a subclass implementing onCreate(Database),
onUpgrade(Database, int, int) and optionally
onOpen(Database), and this class takes care of opening the database
if it exists, creating it if it does not, and upgrading it as necessary. |
| Row | Represents a row (line) of a Cursor. |
| Database | Exposes methods to manage a SQL database. |